SEASON 4, EPISODE 410 -
Melinda encounters the ghost of a bipolar woman, Tammy, who it's assumed had run out on her husband, Roger, and who had been missing for two years. Melinda and Eli work under the theory that Tammy's mental condition had contributed to her rash decision to leave Roger, and after help from a vision they find Tammy's dead body in her car, where it appears that she committed suicide.